Services
Energy Modeling
Better decisions start with better models
Energy modeling provides a clear view of how a building, campus, or district will perform—before construction begins and throughout its lifecycle. By simulating system performance, energy use, thermal comfort, Salas O’Brien turns complex data into insights that help you choose the smartest path forward. Whether you’re weighing design options, targeting net zero, or looking to cut operating costs, early modeling highlights the strategies that will deliver the biggest impact. Our team combines technical expertise with practical experience, making it easier to move from “what if” to confident, cost-effective decisions.
Tailored to your unique needs
When it comes to energy modeling, there are many different levels of scale. Salas O’Brien has a strong team of energy modeling experts who can help support your decision-making. Whether you need an initial basic model to get started or a deeply complex model that evaluates competing variables across a building, campus, or large asset portfolio, our team is here to help you.
Energy Modeling Projects
Energy modeling for code compliance
Salas O’Brien provides Energy Modeling services to support various industry standards and certifications, including:
- LEED: Modeling to meet the requirements of the Leadership in Energy and Environmental Design certification.
- IECC Code: Compliance with the International Energy Conservation Code for energy-efficient building design.
- Green Globes: Energy modeling to achieve Green Globes certification for sustainable building practices.
- Living Building Challenge: Support for the rigorous standards of the Living Building Challenge certification.
- GPSFB Certification: Compliance with the Guiding Principles for Sustainable Federal Buildings, creating alignment with energy efficiency standards.
- 179D: Allocation form confirming energy efficiency of a building required for 179D tax deduction.
We also provide post-occupancy energy modeling services to optimize the energy performance of existing buildings, including:
- Calibrated Model for Measurement and Verification: Development of calibrated models to verify actual energy performance against predicted values.
- Retrofitting of Existing Buildings: Analysis and recommendations for energy-efficient retrofits to improve the performance of existing buildings.
- 179 D Federal Tax Deduction: Support for obtaining federal tax deductions for energy-efficient building improvements.
What we can offer
From conceptual design studies through simulation-driven design and digital twin technology, our team delivers end-to-end energy modeling expertise. We align strategies with your goals at every stage, giving you clarity, confidence, and measurable results.
Conceptual design modeling
Salas O’brien creates early-stage models to test massing, orientation, and envelope strategies to reveal which design choices matter most. This quick analysis helps set the project on the right path from the start.
Load reduction modeling
By simulating how design strategies reduce heating and cooling loads, Salas O’Brien identifies practical ways to shrink system sizes and cut energy demand. The result is efficiency built into the design, not bolted on later.
TRNSYS system verification modeling and digital twinning
We use TRNSYS to simulate complex systems with high fidelity, capturing minute-by-minute performance across decades of operation. Models are fully customizable—components can be added, removed, or adjusted—creating a dynamic digital twin that supports capital decisions and ongoing system updates with verified operational metrics. Salas O’Brien is the exclusive license distributor of the TRNSYS platform and suite of components.
Daylighting analysis
Salas O’Brien evaluates natural light penetration to balance comfort, glare control, and energy savings. Smart daylighting design enhances occupant well-being while reducing reliance on artificial lighting.
Energy benchmarking
Salas O’Brien can help you compare your building’s performance against industry benchmarks to identify areas for improvement.
Energy conservation measures
Salas O’Brien models and tests specific conservation strategies—such as envelope upgrades or system improvements—so you know which will deliver the best return. These insights make it easier to prioritize investments.
Sensitivity & scenario analysis
Salas O’Brien’s models test multiple “what-if” scenarios to see how changes in systems, materials, or operations affect performance. This approach turns uncertainty into clarity when selecting between options.
Net zero energy design
For projects targeting net zero, Salas O’Brien maps out strategies to balance on-site generation with efficient demand. Our models show exactly how to close the gap between ambition and reality.
Renewable energy integration
Salas O’Brien evaluates the potential of solar, wind, and other renewables within your project’s unique context. By testing performance and economics, we help you integrate the right systems with confidence.
Code compliance modeling
Salas O’Brien navigates the technical requirements of LEED, IECC, Green Globes, Living Building Challenge, GPSFB, and 179D. Energy modeling provides the documentation and proof you need for certification and compliance.
Post-occupancy modeling
By calibrating models with real-world data, we verify actual building performance and identify gaps. We also analyze retrofit opportunities and provide support for 179D federal tax deductions.
